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Welcome | STAGES International

Welcome to STAGES International

Trainings, workshops and consulting informed by the STAGES model of human development.

COVID-19 and the STAGES Community

The STAGES Model Explained

Evolutionary & Adaptive

STAGES is an integrally-based development model that charts human development from the first person-perspective encountered in infancy to the latest researched levels of development. The model was created by Terri O’Fallon and is based on decades of educational experience and more than a decade of research. Our scoring system and assessments are based on the most cutting-edge data and research, while our scorers are rigorously trained and tested.


More than a theory, STAGES is being actively applied in half a dozen modalities, from business to psychotherapy to education. It is changing how people perceive themselves and their relationship to the world.

It has been applied successfully to:

  • Psychotherapy & Coaching
  • Business
  • Education
  • Parenting
  • Counseling and Advising


Comprehensive: Includes many dimensions of human experience

Predictive: The precision of the model allows clarity in navigating life stage transitions

Dynamic: Recognizes the fluid nature of human development and works well with other models, such as business, therapeutic, and spiritual.

Actionable: Allows precise actions to be taken to gain concrete results.

What We Offer

Programs and Courses

We offer live online courses, events and trainings, and go-at-your-own-pace classes, all designed to teach this theory while bringing it to life inside of the complexity of the real world.


Existing coaches and therapists can become certified in the STAGES model so that they can meet their clients “where they are” and have the most impact.


Determine your, your clients’, or your executive team’s core level of perspective development, and the option for a debrief about it from one of our core faculty.

Terri O’Fallon is one of the very most important integrally informed researchers now working. I highly recommend checking her out at your earliest opportunity!


Ken Wilber
The Integral Vision

Post-conventional developmental stages are one of the most important yet under researched areas of Integral studies, and we can all be grateful to Terri O’Fallon, who is one of the very few researchers exploring this crucial topic.

Roger Walsh
University of California Irvine Medical School

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